One of the biggest ever studies on cellphone radiation has conclusively found that mobile phones do cause cancer, ending the long-running debate on the dangers of cellphones. The peer-reviewed study, by the National Toxicology Program, found that rats who were exposed to cellphone frequencies got two types of brain tumors as a result. Partial findings from the study, released on Thursday, warned that the results will likely have a huge effect on public health. “Given the widespread global usage of mobile communications among users of all ages, even a very small increase in the incidence of disease resulting from exposure to [radio-frequency radiation] could have broad implications for public health,” the report stated on Thursday. Wsj.com reports: A spokesperson for the National Institutes of Health, which helped oversee the study, wasn’t immediately available for comment. Earlier in the week, the NIH said, “It is important to note that previous human, observational data collected in earlier, large-scale population-based studies have found limited evidence of an increased risk for developing cancer from cellphone use.” While not all biological effects observed in animals necessarily apply to humans, the National Toxicology Program’s $25 million study is one of the biggest and most comprehensive experiments into health [...]